Update windows.yml

- Windows Server 2019 has been retired. The Windows Server 2019 image has been removed as of 2025-06-30. 
- For more details, see actions/runner-images#12045

Author: j2doll

.github/workflows/windows.yml

@@ -33,7 +33,7 @@ on:
 
 jobs:
   build:
-    runs-on: windows-2019
+    runs-on: windows-2022
     steps:
     - name: Install Qt
       uses: jurplel/install-qt-action@v3